Imported Upstream version 2.21.0

[platform/upstream/git.git] / csum-file.c

diff --git a/csum-file.c b/csum-file.c
index 53f5375..53ce37f 100644 (file)
--- a/csum-file.c
+++ b/csum-file.c
@@ -11,7 +11,7 @@
 #include "progress.h"
 #include "csum-file.h"
 
-static void flush(struct sha1file *f, void *buf, unsigned int count)
+static void flush(struct hashfile *f, const void *buf, unsigned int count)
 {
        if (0 <= f->check_fd && count)  {
                unsigned char check_buffer[8192];
@@ -19,7 +19,7 @@ static void flush(struct sha1file *f, void *buf, unsigned int count)
 
                if (ret < 0)
                        die_errno("%s: sha1 file read error", f->name);
-               if (ret < count)
+               if (ret != count)
                        die("%s: sha1 file truncated", f->name);
                if (memcmp(buf, check_buffer, count))
                        die("sha1 file '%s' validation error", f->name);
@@ -42,30 +42,30 @@ static void flush(struct sha1file *f, void *buf, unsigned int count)
        }
 }
 
-void sha1flush(struct sha1file *f)
+void hashflush(struct hashfile *f)
 {
        unsigned offset = f->offset;
 
        if (offset) {
-               git_SHA1_Update(&f->ctx, f->buffer, offset);
+               the_hash_algo->update_fn(&f->ctx, f->buffer, offset);
                flush(f, f->buffer, offset);
                f->offset = 0;
        }
 }
 
-int sha1close(struct sha1file *f, unsigned char *result, unsigned int flags)
+int finalize_hashfile(struct hashfile *f, unsigned char *result, unsigned int flags)
 {
        int fd;
 
-       sha1flush(f);
-       git_SHA1_Final(f->buffer, &f->ctx);
+       hashflush(f);
+       the_hash_algo->final_fn(f->buffer, &f->ctx);
        if (result)
                hashcpy(result, f->buffer);
-       if (flags & (CSUM_CLOSE | CSUM_FSYNC)) {
-               /* write checksum and close fd */
-               flush(f, f->buffer, 20);
-               if (flags & CSUM_FSYNC)
-                       fsync_or_die(f->fd, f->name);
+       if (flags & CSUM_HASH_IN_STREAM)
+               flush(f, f->buffer, the_hash_algo->rawsz);
+       if (flags & CSUM_FSYNC)
+               fsync_or_die(f->fd, f->name);
+       if (flags & CSUM_CLOSE) {
                if (close(f->fd))
                        die_errno("%s: sha1 file error on close", f->name);
                fd = 0;
@@ -86,13 +86,13 @@ int sha1close(struct sha1file *f, unsigned char *result, unsigned int flags)
        return fd;
 }
 
-int sha1write(struct sha1file *f, void *buf, unsigned int count)
+void hashwrite(struct hashfile *f, const void *buf, unsigned int count)
 {
        while (count) {
                unsigned offset = f->offset;
                unsigned left = sizeof(f->buffer) - offset;
                unsigned nr = count > left ? left : count;
-               void *data;
+               const void *data;
 
                if (f->do_crc)
                        f->crc32 = crc32(f->crc32, buf, nr);
@@ -110,43 +110,38 @@ int sha1write(struct sha1file *f, void *buf, unsigned int count)
                buf = (char *) buf + nr;
                left -= nr;
                if (!left) {
-                       git_SHA1_Update(&f->ctx, data, offset);
+                       the_hash_algo->update_fn(&f->ctx, data, offset);
                        flush(f, data, offset);
                        offset = 0;
                }
                f->offset = offset;
        }
-       return 0;
 }
 
-struct sha1file *sha1fd(int fd, const char *name)
+struct hashfile *hashfd(int fd, const char *name)
 {
-       return sha1fd_throughput(fd, name, NULL);
+       return hashfd_throughput(fd, name, NULL);
 }
 
-struct sha1file *sha1fd_check(const char *name)
+struct hashfile *hashfd_check(const char *name)
 {
        int sink, check;
-       struct sha1file *f;
+       struct hashfile *f;
 
        sink = open("/dev/null", O_WRONLY);
        if (sink < 0)
-               return NULL;
+               die_errno("unable to open /dev/null");
        check = open(name, O_RDONLY);
-       if (check < 0) {
-               int saved_errno = errno;
-               close(sink);
-               errno = saved_errno;
-               return NULL;
-       }
-       f = sha1fd(sink, name);
+       if (check < 0)
+               die_errno("unable to open '%s'", name);
+       f = hashfd(sink, name);
        f->check_fd = check;
        return f;
 }
 
-struct sha1file *sha1fd_throughput(int fd, const char *name, struct progress *tp)
+struct hashfile *hashfd_throughput(int fd, const char *name, struct progress *tp)
 {
-       struct sha1file *f = xmalloc(sizeof(*f));
+       struct hashfile *f = xmalloc(sizeof(*f));
        f->fd = fd;
        f->check_fd = -1;
        f->offset = 0;
@@ -154,18 +149,18 @@ struct sha1file *sha1fd_throughput(int fd, const char *name, struct progress *tp
        f->tp = tp;
        f->name = name;
        f->do_crc = 0;
-       git_SHA1_Init(&f->ctx);
+       the_hash_algo->init_fn(&f->ctx);
        return f;
 }
 
-void sha1file_checkpoint(struct sha1file *f, struct sha1file_checkpoint *checkpoint)
+void hashfile_checkpoint(struct hashfile *f, struct hashfile_checkpoint *checkpoint)
 {
-       sha1flush(f);
+       hashflush(f);
        checkpoint->offset = f->total;
        checkpoint->ctx = f->ctx;
 }
 
-int sha1file_truncate(struct sha1file *f, struct sha1file_checkpoint *checkpoint)
+int hashfile_truncate(struct hashfile *f, struct hashfile_checkpoint *checkpoint)
 {
        off_t offset = checkpoint->offset;
 
@@ -174,17 +169,17 @@ int sha1file_truncate(struct sha1file *f, struct sha1file_checkpoint *checkpoint
                return -1;
        f->total = offset;
        f->ctx = checkpoint->ctx;
-       f->offset = 0; /* sha1flush() was called in checkpoint */
+       f->offset = 0; /* hashflush() was called in checkpoint */
        return 0;
 }
 
-void crc32_begin(struct sha1file *f)
+void crc32_begin(struct hashfile *f)
 {
        f->crc32 = crc32(0, NULL, 0);
        f->do_crc = 1;
 }
 
-uint32_t crc32_end(struct sha1file *f)
+uint32_t crc32_end(struct hashfile *f)
 {
        f->do_crc = 0;
        return f->crc32;